چكيده فارسي :
Twin algorithm is a new concept of designing stream cipher algorithm using well-known pre-tested algorithms to immune the known plaintext attack and the correlation attack. In this paper, simple twin, ternary, and quaternary variants algorithms are discussed with periods 2P, 3P, 4P respectively, where P is the period of the base algorithm. The complexity and randomness properties are the same as the base algorithm.
